Was that on the SCSI or the IDE header?
The reason I ask is that if it was a SCSI disk, it's very likely (at that size) that it's an ATA drive on a SCSI-IDE converter board. If so, the converter will be a PCB sitting under the drive, and another short FFC (flat flex cable) at the opposite end from the SCSI connector that goes up from the converter PCB to the actual drive header.
If it is, you should hang on to that PCB for dear life }
